const array = [11, 22, 33, 44, 55, 66, 77, 88, 99, 100];

console.log(array.findIndex(item => item === 99));

const intA8 = new Int8Array(11);
intA8[0] = 11;
intA8[10] = 128;
console.log('intA8', intA8);
